Eric Carle uses a hole instead of flaps in his evergreen board book The Very Hungry Caterpillar Photograph: Eric Carle/PR

My eldest loves books with flaps and pull-out bits but her little brother ruins them all. This has caused so much grief in our household that I'm tempted not to buy any more (we certainly can't borrow them). Could you recommend robust pop-up books or alternatives that might entertain them both?

Eric Hill's Where's Spot? was one of the very first flap books and remains one of the most successful because of its simplicity, and because the flaps are very well stuck down! But there are many excellent and more durable alternatives to flaps.